异电荷聚电解质自组装水凝胶在无固相煤层气钻井液中的特性

doi:10.7623/syxb201806011

石油学报 ›› 2018, Vol. 39 ›› Issue (6): 719-726.DOI: 10.7623/syxb201806011

异电荷聚电解质自组装水凝胶在无固相煤层气钻井液中的特性

贺垠博¹, 蒋官澄¹, 王勇², 杨丽丽¹, 史亚伟¹, 张永清², 胡景东²

1. 中国石油大学油气资源与探测国家重点实验室北京 102249;
2. 中国石油集团渤海钻探工程有限公司第四钻井公司河北任丘 062552

收稿日期:2017-12-26 修回日期:2018-05-02 出版日期:2018-06-25 发布日期:2018-07-03
通讯作者: 蒋官澄,男,1966年2月生,1987年获西南石油学院学士学位,2005年获中国海洋大学博士学位,现为中国石油大学(北京)石油工程学院教授、博士生导师,主要从事油田化学方面的研究与教学。Email:jgc5786@126.com
作者简介:贺垠博,男,1989年10月生,2011年获南京理工大学学士学位,2015年获中国石油大学(北京)硕士学位,现为中国石油大学(北京)油气井工程专业博士研究生,主要从事钻井液处理剂的研究。Email:344925897@qq.com
基金资助:
国家自然科学创新研究群体项目（No.51521063）、国家自然科学基金面上项目（No.51474231）和国家科技重大专项（2017ZX05009-003、2016ZX05020-004、2016ZX05040-005）资助。

Properties of self-assembled hydrogel of oppositely-charged polyelectrolytes in solid-free coalbed methane drilling fluid

He Yinbo¹, Jiang Guancheng¹, Wang Yong², Yang Lili¹, Shi Yawei¹, Zhang Yongqing², Hu Jingdong²

1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
2. No.4 Drilling Company, CNPC Bohai Drilling Engineering Company Limited, Hebei Renqiu 062552, China

Received:2017-12-26 Revised:2018-05-02 Online:2018-06-25 Published:2018-07-03

摘要/Abstract

摘要：

基于异电荷聚电解质之间的分子自组装，以线型阴离子聚电解质APE和超支化阳离子聚电解质CPE制备了一种高性能水凝胶。相行为研究结果表明，APE与CPE在清水中共存时将以络合物的形态析出，大量的NaCl则可通过"聚电解质效应"将络合物解离。流变性测试结果表明，通过与APE之间的强静电作用，CPE增强了APE溶液中被盐破坏的凝胶网络结构，有效改善了悬浮性与剪切稀释性。APE-CPE水凝胶具有优良的高温稳定性，在饱和盐侵下的抗温能力优于一般的阴离子及两性离子聚电解质水凝胶。APE-CPE水凝胶同时具备良好的抑制、包被性能，易被破胶剂破胶且残渣率低。以APE-CPE水凝胶为基础，研制了配方简单、使用NaCl加重的低密度无固相煤层气钻井液。

关键词: 聚电解质, 自组装, 水凝胶, 煤层气, 无固相钻井液

Abstract:

Based on self-assembly between oppositely-charged polyelectrolytes, a high-performance hydrogel is prepared utilizing linear anionic polyelectrolyte (APE)and hyperbranched cationic polyelectrolyte (CPE). The phase behavior research indicates that APE and CPE precipitate as complex coacervate in aqueous solution. The APE-CPE coacervate can be dissociated by large quantities of NaCl under "polyelectrolyte effect". Rheology tests indicate that CPE strengthens gel network of APE in brine by strong intermolecular electrostatic forces, and therefore effectively improves suspending and shear-thinning performance. Compared with common anionic and amphoteric polyelectrolyte hydrogel, APE-CPE hydrogel owns much better high-temperature stability. In addition, APE-CPE hydrogel possesses well inhibition and encapsulation performance. The gel structure can be easily broken by gel breakers, leaving low residue content. On the basis of APE-CPE hydrogel, a low-density, solid-free coalbed methane drilling fluid weighted by NaCl is prepared with simple formula.

Key words: polyelectrolyte, self-assembly, hydrogel, coalbed methane, solid-free drilling fluid

中图分类号:

TE254.4

贺垠博, 蒋官澄, 王勇, 杨丽丽, 史亚伟, 张永清, 胡景东. 异电荷聚电解质自组装水凝胶在无固相煤层气钻井液中的特性[J]. 石油学报, 2018, 39(6): 719-726.

He Yinbo, Jiang Guancheng, Wang Yong, Yang Lili, Shi Yawei, Zhang Yongqing, Hu Jingdong. Properties of self-assembled hydrogel of oppositely-charged polyelectrolytes in solid-free coalbed methane drilling fluid[J]. Acta Petrolei Sinica, 2018, 39(6): 719-726.

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异电荷聚电解质自组装水凝胶在无固相煤层气钻井液中的特性

Properties of self-assembled hydrogel of oppositely-charged polyelectrolytes in solid-free coalbed methane drilling fluid

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